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Levers And Pulleys Review
Test Description: Use this review to help you prepare for the Levers and Pulleys test.
Instructions: Answer all questions to get your test result.
1) The pivot point in a lever system is called a(n)...
A
fulcrum.
B
lever arm.
C
load.
D
effort
2) The unit used to measure force is called a...
A
gram.
B
liter.
C
newton.
D
meter.
3) A baseball bat is one type of lever system. What class lever is it?
A
Class-1
B
Class-2
C
Class-3
D
Class-1 and Class-3
4) Which of the pairs of levers belongs to the same class?
A
Fishing Rod and Fly Swatter
B
Teeter-totter and Hockey Stick
C
Nutcracker and Broom
D
Tweezers and Scissors
5) What should you always do first with a spring scale?
A
Zero it out.
B
Attach it to the rope.
C
Turn it upside down.
D
Pull on the hook.
6) A single-fixed pulley is useful, because...
A
it gives you a directional advantage.
B
it lessens the effort required to lift a load.
C
it increases the effort required to lift a load.
D
it gives you a mechanical advantage.
7) A single-movable pulley system can pose a challenge, because...
A
it does not decrease the amount of effort required to lift a load.
B
a directional advantage changes the direction of the effort.
C
you can only lift the load as high as the level you are at.
D
you will have less rope to pull.
8) What happens to the amount of effort required to lift a load on a lever when you move the effort closer to the fulcrum?
A
You need less effort.
B
You need the same amount of effort.
C
Nothing changes.
D
You need more effort.
9) Since the load on a nutcracker is found in the middle, it is a class-? lever.
A
4
B
3
C
2
D
1
10) What pulley system does not give an advantage by reducing effort?
A
Single-Fixed/Single-Movable that you pull up on.
B
Single-Fixed
C
Single-Movable
D
Single-Fixed/Single-Movable that you pull down on.
11) If a pulley system had FOUR segments of rope that help lift the load, what is the effort reduced by?
A
One Third
B
It is not reduced, it is four times harder to lift the load.
C
One Fourth
D
One Half
12) What is the fulcrum?
A
The mass the lever lifts.
B
The point where the lever arm pivots.
C
Where the load is attached on a pulley system.
D
The fullest point of the lever.
13) The mass lifted or the resistance overcome on a lever is called what?
A
Fulcrum
B
Load
C
Arm
D
Effort
14) What two things make up work?
A
Force and Distance
B
Time and Distance
C
Force and Load
D
Fulcrum and Force
15) What situation would give you a mechanical advantage?
A
Sliding a chair across the room.
B
Using a fixed-pulley system.
C
Lifting a large box.
D
Using a fly swatter.
16) What situation would give you a directional advantage?
A
Using a lever to lift a load upward.
B
Using a movable-pulley system.
C
Using a fixed-pulley system.
D
Turning your bike sharply around a corner.
*select an answer for all questions
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